CVE-2017-18873: Input Validation
Published Jun 19, 2020
·Updated
An issue was discovered in Mattermost Server before 4.3.0, 4.2.1, and 4.1.2. It allows attackers to cause a denial of service (channel invisibility) via a misformatted post.
Affected Software
6 affected components
Mattermost Mattermost Server<4.1.2
Mattermost Mattermost Server>=4.2.0<4.2.1
Mattermost Mattermost Server=4.3.0-rc1
Mattermost Mattermost Server=4.3.0-rc2
Mattermost Mattermost Server=4.3.0-rc3
Mattermost Mattermost Server=4.3.0-rc4
Event History
Jun 19, 2020
CVE Published
via MITRE·05:44 PM
Data Sourced
via MITRE·05:44 PM
Description
Frequently Asked Questions
1
What is the severity of CVE-2017-18873?
CVE-2017-18873 is classified as a high severity vulnerability due to its potential to cause a denial of service.
2
How do I fix CVE-2017-18873?
To fix CVE-2017-18873, upgrade to Mattermost Server version 4.3.0 or later.
3
What types of attacks can CVE-2017-18873 enable?
CVE-2017-18873 can enable denial of service attacks by allowing channel invisibility through misformatted posts.
4
Which Mattermost Server versions are affected by CVE-2017-18873?
CVE-2017-18873 affects Mattermost Server versions prior to 4.3.0, 4.2.1, and 4.1.2.
5
Are there workarounds for CVE-2017-18873 if I cannot update?
There are no recommended workarounds for CVE-2017-18873; updating to a secure version is essential.